Form A6257
Part Number D301455X012
March 2008
Water and Steam Properties Calculations
Program (for the FloBoss™ 107)
User Manual
Remote Automation Solutions
Water and Steam Properties Calculations Program User Manual
Revision Tracking Sheet
March 2008
This manual may be revised periodically to incorporate new or updated information. The revision date
of each page appears at the bottom of the page opposite the page number. A change in revision date to
any page also changes the date of the manual that appears on the front cover. Listed below is the
revision date of each page (if applicable):
Page Revision
Initial release Mar-08
NOTICE
Remote Automation Solutions (“RAS”), division of Emerson Process Management shall not be liable for technical or editorial errors in this
manual or omissions from this manual. RAS MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE IMPLIED
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LIMITED TO, LOSS OF PRODUCTION, LOSS OF PROFITS, LOSS OF REVENUE OR USE AND COSTS INCURRED INCLUDING
WITHOUT LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF THIRD PARTIES.
Bristol, Inc., Bristol Babcock Ltd, Bristol Canada, BBI SA de CV and the Flow Computer Division are wholly owned subsidiaries of Emerson
Electric Co. doing business as Remote Automation Solutions (“RAS”), a division of Emerson Process Management. FloBoss, ROCLINK,
Bristol, Bristol Babcock, ControlWave, TeleFlow and Helicoid are trademarks of RAS. AMS, PlantWeb and the PlantWeb logo are marks of
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maintenance of any RAS product remains solely with the purchaser and end-user.
© 2008 Remote Automation Solutions, division of Emerson Process Management. All rights reserved.
ii Issued Mar-08
Water and Steam Properties Calculations Program User Manual
Contents
Page
Chapter 1 – Introduction 1-1
1.1 Scope and Organization................................................................................................... 1-1
1.2 Product Overview............................................................................................................. 1-1
1.3 Program Operation...........................................................................................................1-2
1.3.1 Supported IAPWS Water and Steam Regions .................................................... 1-2
1.4 Program Requirements .................................................................................................... 1-4
1.4.1 License Keys........................................................................................................ 1-4
Chapter 2 – Installation 2-1
2.1 Installing the License Key ................................................................................................ 2-1
2.2 Downloading the Program................................................................................................ 2-3
Chapter 3 – Configuration 3-1
3.1 Water/Steam Setup Screen ............................................................................................. 3-2
3.2 Water/Steam Properties Values Screen .......................................................................... 3-4
3.3 Saving the Configuration.................................................................................................. 3-7
Chapter 4 – Reference Materials 4-1
4.1 Calculation Details ........................................................................................................... 4-1
4.2 Point Type 27: Water/Steam Setup ................................................................................. 4-4
4.3 Point Type 28: Water/Steam Values................................................................................ 4-5
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Water and Steam Properties Calculations Program User Manual
[This page is intentionally left blank.]
iv Contents Issued Mar-08
Water and Steam Properties Calculations Program User Manual
Chapter 1 – Introduction
This chapter describes the structure of this manual and presents an
overview of the Water and Steam Properties Calculations for the
FloBoss™ 107.
1.1 Scope and Organization
This document serves as the user manual for the Water and Steam
Properties Calculations program, which is intended for use in a FloBoss
107 (FB107). This manual describes how to download, install, and
configure the Water and Steam Properties Calculations user program
(referred to as the “Water and Steam program” or “the program”
throughout the rest of this manual). You access and configure this program
using ROCLINK™ 800 Configuration Software loaded on an IBMcompatible personal computer running Windows® 98, NT 4.0 (with
Service Pack 6), 2000 (with Service Pack 2), or XP.
The sections in this manual provide information in a sequence appropriate
for first-time users. Once you become familiar with the procedures and the
software, the manual becomes a reference tool.
This manual has the following major sections:
Chapter 1 – Introduction
Chapter 2 – Installation
Chapter 3 – Configuration
Chapter 4 – Reference
This manual assumes that you are familiar with the FB107 and its
configuration. For more information, refer to the FloBoss 107 Flow
Manager Instruction Manual (Form A6206) or the ROCLINK 800
Configuration Software User Manual (for FloBoss 107) (Form A6217).
1.2 Product Overview
The Water and Steam program allows a FloBoss 107 to calculate density,
enthalpy (heating value), entropy, viscosity, and specific heat ratio for
water and steam applications in either Metric or English (US) units.
Program calculations conform to the International Association for the
Properties of Water and Steam, International Formulation 1997 (IAPWSIF-97) standard. This program is intended for use with the ISO5167-
2003 calculation standard provided by the FB107 firmware or a User
C flow calculation program compatible with water and steam
properties.
The Water and Steam program is compatible with FB107 firmware
version 1.10 and greater. The user program is downloaded and configured
in the FB107 with ROCKLINK™ 800 Configuration Software (version
1.75 or greater).
Issued Mar-08 Introduction 1-1
Water and Steam Properties Calculations Program User Manual
The components of the Water and Steam program are:
The Water and Steam user program that loads into FloBoss memory to
perform the calculations.
License Key, containing license(s) enabling the Water and Steam
program.
This manual, Form A6257
1.3 Program Operation
With the program installed, the FB107 reads the current flowing static
pressure and temperature once every second. At the completion of each
Integral or Base Multiplier Period (or IMP/BMP), the program executes
the water and steam properties calculations, using the average flowing
static pressure and temperature during the IMP/BMP. The program writes
the resulting values to standard FB107 point types and the associated userdefined point type for the water and steam values.
1.3.1 Supported IAPWS Water and Steam Regions
Figure 1. IAPWS Water and Steam Regions 1 through 5
The Water and Steam program supports IAPWS Water and Steam Regions
1, 2, 4, and 5 (see Figure 1). The program does not support IAPWS
Water and Steam Region 3. The water and steam calculations
implemented in this user program are valid for pressures between 0.69 and
16513 kPa (0.1 and 2395 PSIA) and temperatures between 0 and 800°C
(32 and 1472°F). Calculations of water properties for higher pressures—
between 16513 and 100000 kPa (2395 and 14504 PSIA)—are valid for
temperatures between 0°C (32°F) and the Region 1 and 3 boundary.
Calculations of steam properties for higher pressures—between 16513 and
100000 kPa (2395 and 14504 PSIA)—are valid for temperatures between
1-2 Introduction Issued Mar-08
Water and Steam Properties Calculations Program User Manual
the Region 2 and 3 boundary and 800°C (1472°F). The calculations are
also valid for higher steam temperatures, when the pressure is between
0.69 and 10000 kPa (0.1 and 1450 PSIA). In these cases the temperature
can range from 800 to 2000°C (1472 to 3632 °F).
Note: If the static pressure and temperature lie within Region 3, the
program sets all of the thermodynamic properties—including
density, viscosity, specific heat ratio, enthalpy, and entropy—to
1.0 to provide an indication of calculation within this unsupported
area.
If you know the fluid is saturated water or steam, the phase can be
specified along with the choice of pressure or temperature used to
determine the properties. In this case, the conditions are set to Region 4
and the quality is set to 0% if the phase is specified as saturated water or
100% if the phase is specified as saturated steam.
Issued Mar-08 Introduction 1-3
Water and Steam Properties Calculations Program User Manual
1.4 Program Requirements
You download the Water and Steam program to—and then run it from—
the Flash and RAM memory on the FB107. The Water and Steam program
is compatible with firmware version 1.10 (or greater) of the FB107.
Download and configure the program using the ROCLINK 800
Configuration software (version 1.75 or greater).
Program specifics include:
File Name
WaterAndSteam_3.bin
1.4.1 License Keys
Target Unit/
Version
FB107 1.10 27, 28 27,657 16,384 1.75 28, 29
User Defined
Point (UDP)
Flash Used
(in bytes)
DRAM Used
(in bytes)
ROCKLINK
800
Version
Display
Number
Note: You must connect a PC to the FB107’s LOI port before starting the
download.
For information on viewing the memory allocation of user programs, refer
to ROCLINK 800 Configuration Software User Manual (for FloBoss 107)
(Form A6217).
Some applications require that you install a license in the CPU to run the
application. This license software is specific to these applications and is
the property of the individual vendor (shown in the Vendor Name field on
the License Key Administrator screens).
RAS (and other authorized vendors) distributes software licenses on
security-enhanced universal serial bus (USB) drives.
You must install the following license keys to use the Water and Steam
Program.
Water and Steam License Key.
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Water and Steam Properties Calculations Program User Manual
Chapter 2 – Installation
This section provides instructions for installing the Water and Steam
program. Read Section 1.4 of this manual for program requirements.
Note: The program and license key can be installed in any order. The
manual shows the installation of the license key first.
2.1 Installing the License Key
A license key is required to use the Water and Steam program. To install a
USB key-based license on the FB107:
1. Insert the USB license key in a USB port on your PC.
2. Select Utilities > License Key Administrator > Transfer Between
Device and Key from the ROCLINK 800 menu bar. The Transfer
Licenses Between a Device and a Key screen displays.
Figure 2. Transfer Licenses Between a Device and a Key
Issued Mar-08 Installation 2-1
Water and Steam Properties Calculations Program User Manual
Note: This screen has three sections. The upper portion (Licenses on
Device) shows any software licenses installed on the FB107. The
middle portion (Licenses on Key) shows software licenses on the
license key. The lower portion of the screen (License Key Event
Log) provides a rolling log of the last eight events related to this
license key.
3. Select the key-based license you want to transfer to the FB107 (Water
and Steam, as shown in Figure 2).
4. Click Move to Device. ROCLINK moves one instance of the license
from the key to the FB107 and updates the screen.
Figure 3. License Installed
Note: An FB107 can hold up to six different licenses, although you can
install only one instance of each license on the FB107. When you
click Move to Device, ROCLINK 800 moves only one instance of
the license onto the FB107 and automatically decreases the license
quantity on the USB key by one.
5. Verify the license name displays in the Licenses on Device section of
the screen. Proceed to Section 2.2 to download the user program.
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Water and Steam Properties Calculations Program User Manual
2.2 Downloading the Program
This section provides instructions for installing the program into the Flash
memory on the FB107.
To download the program using ROCLINK 800 software:
1. Connect the FB107 to your computer using the LOI port.
2. Start and logon to ROCLINK 800.
3. Select Utilities > User Program Administrator from the ROCLINK
menu bar. The User Program Administrator screen displays (see
Figure 4):
Figure 4. User Program Administrator
4. Click Browse in the Download User Program File frame. The Select
User Program File screen displays (see Figure 5).
5. Select the path and user program file to download from the CD-ROM.
(Program files are typically located in the Program Files folder on the
CD-ROM). As Figure 5 shows, the screen lists all valid user program
files with the .BIN extension:
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Water and Steam Properties Calculations Program User Manual
Figure 5. Select User Program File
6. Click Open to select the program file. The User Program
Administrator screen displays. As shown in Figure 6, note that the
Download User Program File frame identifies the selected program
and that the Download & Start button is active:
Figure 6. User Program Administrator
2-4 Installation Issued Mar-08
Water and Steam Properties Calculations Program User Manual
7. Click Download & Start to begin loading the selected programs. The
following message displays:
Figure 7. Confirm Download
8. Click Yes to begin the download. When the download completes the
following message displays:
Figure 8. ROCLINK 800 Download Confirmation
9. Click OK. The User Program Administrator screen displays (see
Figure 9). Note that:
The User Programs Installed in Device frame identifies the
installed program(s).
The Status field indicates that the program is running.
Figure 9. User Program Administrator
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Water and Steam Properties Calculations Program User Manual
Note: If you install the program before you install the license key, the
Status field reads “License Key Not Found.”
10. Click Close. The ROCLINK 800 screen displays and the download is
complete.
2-6 Installation Issued Mar-08
Water and Steam Properties Calculations Program User Manual
Chapter 3 – Configuration
After you have loaded the Water and Steam program on the FB107 and
installed the required license, you configure and monitor the program
using two program-specific displays (Water/Steam Setup and
Water/Steam Values):
Use the Water/Steam Setup display to configure the parameters
associated with the Water and Steam program.
Use the Water/Steam Values screen to view results of the Water and
Steam program calculations.
You can access all the program-specific screens from the main ROCLINK
800 screen:
Figure 10. ROCLINK 800
Issued Mar-08 Configuration 3-1
Water and Steam Properties Calculations Program User Manual
3.1 Water/Steam Setup Screen
Use this screen to enable the Water and Steam program to calculate
properties for a meter run and set the option for determining the phase of
the water. The phase can either be calculated by the program or specified
as saturated water or steam. If saturated water or steam is selected for the
phase, you must specify a temperature or pressure input to be used for the
properties calculations.
To access this screen:
1. Select User Program > Water and Steam.
2. Select Display #28, Water/Steam Setup.
3. Double-click #1, Meter #1. The Water/Steam Setup screen displays.
Figure 11. Water/Steam Setup Screen
Note: The Water/Steam Properties Enabled/Disabled selection must be
set to Enabled to specify setup parameters.
4. Complete the screen fields based on your organization’s requirements.
Field Description
Point Number
Water/Steam
Properties
Program Status
3-2 Configuration Issued Mar-08
Selects the logical number of the meter run to
configure. Click d to display all defined instances.
This read-only field shows the current state of the
user program. Valid values are: Program Not
Loaded, Program Loaded – Not Started, Program
Running, Program Shutting Down, Not Running –
Library Version Error, Not Running – License Not
Found, and Not Running – License Expired.
Water and Steam Properties Calculations Program User Manual
Field Description
Meter Tag
Meter
Description
Active Flow
Calc
Active
Properties Calc
Water/Steam
Properties
Phase Option
Calculate the
Sets the unique identifier for the selected meter.
Sets the description of the selected meter.
This read-only field shows the flow calculation
standard currently performing flow calculations for the
selected meter run.
This read-only field shows the properties calculation
standard currently performing properties calculations
for the selected meter run.
Enables or disables the Water and Steam program to
perform calculations for the selected meter run. Valid
values are Enabled or Disabled.
Sets the method used to determine the phase of the
fluid. Valid values are:
The phase is calculated based
Phase – Uses the
Flowing
Temperature and
Pressure Inputs
on the flowing pressure and
temperature inputs. If the
flowing temperature is within
1.8 Deg F (1.0 Deg C) of the
saturation temperature for the
current flowing pressure, the
conditions are considered
saturated and the phase is set
to gas (steam). This is the
default selection.
Set the Phase to
Set the Phase to
Set the Phase to
Set the Phase to
Saturated Steam –
Use the Flowing
Pressure Input
Saturated Steam –
Use the Flowing
Temperature Input
Saturated Water –
Use the Flowing
Pressure Input
Saturated Water –
Use the Flowing
Temperature Input
The phase is set to saturated
steam and the properties are
calculated using the flowing
pressure.
The phase is set to saturated
steam and the properties are
calculated using the flowing
temperature.
The phase is set to saturated
water and the properties are
calculated using the flowing
pressure.
The phase is set to saturated
water and the properties are
calculated using the flowing
temperature.
5. Click Apply to save any changes you have made to this screen.
6. Proceed to Section 3.2 to view the Steam/Water Properties Values
screen.
Issued Mar-08 Configuration 3-3
Water and Steam Properties Calculations Program User Manual
3.2 Water/Steam Properties Values Screen
Use this screen to view the calculation results of the Water and Steam
program.
To access this screen:
1. Select User Program > Water and Steam.
2. Select Display #29, Water/Steam Values.
3. Double-click #1, Meter #1. The Water/Steam Values screen displays.
Figure 12. Water/Steam Values Screen
Note: The Water/Steam Properties Enabled/Disabled selection on the
Water/Steam Setup screen must be set to Enabled to view
calculation values.
4. Review the values in the following fields:
Field Description
Point Number
Water/Steam
Properties
Program Status
Meter Tag
3-4 Configuration Issued Mar-08
Selects the logical number of the meter run to view.
Click d to display all defined instances.
This read-only field shows the current state of the
user program. Valid values are: Program Not
Loaded, Program Loaded – Not Started, Program
Running, Program Shutting Down, Not Running –
Library Version Error, Not Running – License Not
Found, and Not Running – License Expired.
Sets the unique identifier for the selected meter.
Water and Steam Properties Calculations Program User Manual
Field Description
Meter
Description
Active Flow Calc
Active Properties
Calc
Static Pressure
Flowing
Temperature
Flowing Density
(also Base
Density)
Viscosity
Sets the description of the selected meter.
This read-only field shows flow calculation standard
currently performing flow calculations for the selected
meter run.
This read-only field shows the properties calculation
standard currently performing property calculations for
the selected meter run.
This read-only field displays the flowing static
pressure. Units are PSIG, PSIA, or kPa.
This read-only field displays the current flowing
temperature. Units are Deg F or Deg C.
This read-only field displays the fluid density at the
average flowing pressure and temperature during the
previous IMP/BMP. Density units are Lb/CF or Kg/M
The program sets the density at base conditions to the
density at flowing conditions, since setting base
conditions for water and steam flow rate
measurements is not a common practice.
This read-only field displays the calculated viscosity
at the average flowing pressure and temperature
during the previous IMP/BMP. Units are Lbm/Ft-Sec
or Cp.
3
.
Specific Heat
Ratio (Cp/Cv)
Cp
Cv
Enthalpy
Entropy
This read-only field displays the calculated ratio of
specific heats (Cp/Cv) at the average flowing pressure
and temperature during the previous IMP/BMP.
This read-only field displays the specific heat
(constant pressure) at the average flowing pressure
and temperature during the previous IMP/BMP. Units
are BTU/Lb-Deg R or kJ/Kg-Deg K.
This read-only field displays the specific heat
(constant volume) at the average flowing pressure
and temperature during the previous IMP/BMP. Units
are BTU/Lb-Deg R or kJ/Kg-Deg K.
This read-only field displays the enthalpy (heating
value) at the average flowing pressure and
temperature during the previous IMP/BMP. Units are
BTU/Lb or MJ/Kg.
This read-only field displays the entropy at the
average flowing pressure and temperature during the
previous IMP/BMP. Units are BTU/Lb-Deg R or kJ/Kg-
Deg K.
Issued Mar-08 Configuration 3-5
Water and Steam Properties Calculations Program User Manual
Field Description
IAPWS-97
Region
This read-only field displays the region (1, 2, 3, 4, or
5, as defined by the standard presented by the
International Association for the Properties of Water
and Steam, International Formulation 1997) in which
the average flowing pressure and temperature resided
during the previous IMP/BMP.
Notes:
If conditions reside in Region 3, the message
“Region 3 is Not Supported” displays and the
program sets the properties values to 1.0.
If conditions reside in Region 4, three
additional fields display including either
Saturated Steam or Saturated Water
(depending on the Phase), Pressure, and
Temperature.
5. Proceed to Section 3.3 to save your configuration.
3-6 Configuration Issued Mar-08
Water and Steam Properties Calculations Program User Manual
3.3 Saving the Configuration
Whenever you modify or change the configuration, it is a good practice to
save the final configuration to memory. To save the configuration:
1. Select ROC > Flags. The Flags screen displays:
Figure 13. Flags
2. Click Save Configuration. A verification message displays:
Figure 14. Save Verification
Issued Mar-08 Configuration 3-7
Water and Steam Properties Calculations Program User Manual
3. Click Yes. When the save process completes, a confirmation message
displays:
Figure 15. Confirmation
Note: Depending on the size and complexity of the user program, this
process may take several minutes. When the process ends, the
Status field on the Flags screen displays Completed.
4. Click Update on the Flags screen. This completes the process of
saving your new configuration.
Note: For archive purposes, you should also save this configuration to
your PC’s hard drive or a removable media (such as a diskette or a
flash drive) using the File > Save Configuration option on the
ROCLINK 800 menu bar.
3-8 Configuration Issued Mar-08
Water and Steam Properties Calculations Program User Manual
Chapter 4 – Reference Materials
This section provides tables of information on the user-defined point types
used by the Water/Steam Properties program.
Calculation Details
Point Type 27: Water/Steam Setup
Point Type 28: Water/Steam Values
4.1 Calculation Details
The calculations performed to determine the thermodynamic properties for
Regions 1, 2, 4, and 5 are shown in the standard presented by the
International Association for the Properties of Water and Steam,
International Formulation 1997 (IAPWS-IF-97). Table 1 shows the
parameters and the associated TLPs used as inputs to the calculations.
Table 2 shows the parameters and the associated TLPs where the results
are stored. The parameters in which the program stores the calculated
properties are available to the flow calculation of the meter run.
Table 1. Calculation Input Parameters
Parameter Definition TLP
Average Flowing
Pressure (Pf)
Average Flowing
Temperature (Tf)
Units of Measurement
Integral or Base
Multiplier Period
(IMP/BMP)
Enable Water and
Steam
The average pressure during the
previous IMP/BMP. Units are PSIA
or kPa. The program uses this
pressure for the water/steam
properties calculations.
The average temperature during the
previous IMP/BMP. Units are Deg F
or Deg C. The program uses this
temperature for the water/steam
properties calculations.
Specifies the units the program uses
to express the results of the
water/steam properties calculations.
Valid values are 0 (US) or 1(metric).
The time period, in minutes, over
which the program averages the
flowing static pressure and
temperature. At the completion of the
IMP/BMP period, the program uses
these averages to calculate the fluid
properties.
Specifies if the Water and Steam
program is to be enabled for the
meter run.
47,x,22
47,x,23
46,x,2,Bit 3
and
15,x,25
46,x,6
27,x,1
Issued Mar-08 Reference 4-1
Water and Steam Properties Calculations Program User Manual
Phase Option
Specifies the option used for
determining the phase of the fluid
and calculating the properties. Valid
values are:
0
The phase is calculated based
on the flowing pressure and
temperature inputs. If the
flowing temperature is within
1.8 Deg F (1.0 Deg C) of the
saturation temperature for the
current flowing pressure, the
conditions are considered
saturated and the phase is set
to gas (steam).
27,x,2
1
The phase is set to saturated
steam and the properties are
calculated using the flowing
pressure.
2
The phase is set to saturated
steam and the properties are
calculated using the flowing
temperature.
3
The phase is set to saturated
water and the properties are
calculated using the flowing
pressure.
4
The phase is set to saturated
water and the properties are
calculated using the flowing
temperature.
Table 2. Calculation Results Parameters
Parameter Definition TLP
IAPWS-IF-97 Region
in which the flowing
conditions of the fluid
reside.
Entropy
Valid regions are 1, 2, 4, and 5. If
conditions reside in Region 3, the
program sets the value of each of
the properties to 1.0.
The entropy during the previous
IMP/BMP. Units are BTU/Lb-Deg R
or kJ/Kg-Deg K.
28,x,0
28,x,1
Cp
Cv
Temperature Used for
Properties
4-2 Reference Issued Mar-08
The specific heat (constant pressure)
during the previous IMP/BMP. Units
are BTU/Lb-Deg R or kJ/Kg-Deg K.
The specific heat (constant volume)
during the previous IMP/BMP. Units
are BTU/Lb-Deg R or kJ/Kg-Deg K.
The average temperature used to
determine the properties. Units are
Deg F or Deg C.
28,x,2
28,x,3
28,x,4
Water and Steam Properties Calculations Program User Manual
Pressure Used for
Properties
Enthalpy (Heating
Value)
Viscosity, in Cp
The average pressure used to
determine the properties. Units are
PSIA, PSIG, or kPa.
The enthalpy during the previous
IMP/BMP. Units are BTU/Lb or
MJ/Kg.
The viscosity during the previous
IMP/BMP. Units are Lbm/Ft-Sec or
Cp.
28,x,5
46,x,17
46,x,18
Specific Heat Ratio,
Cp/Cv
Density at flowing
conditions
Density at base
conditions
The ratio of specific heats (Cp/Cv)
during the previous IMP/BMP.
The density during the previous
IMP/BMP. Units are Lb/CF or Kg/M
The program sets the density at
base conditions to the density at
flowing conditions, since setting base
conditions for water and steam flow
rate measurements is not a common
practice. Units are Lb/CF or Kg/M
3
3
.
46,x,19
47,x,24
.
47,x,25
Issued Mar-08 Reference 4-3
Water/Steam Thermodynamic Properties Calculations Program User Manual
4.2 Point Type 27: Water/Steam Setup
Point type 27 contains the parameters for configuring the Water and Steam program. There are four logicals of this point type (one logical for
each meter run).
Parm
#
Name Access
Data
Type
Length Range Default Description of functionality and meaning of values
0 Point Tag ID R/O AC 10 0x20 → 0x7E for
each ASCII
character
1 Enable Water Props R/W UINT8 1 0 → 1 0 Enable/disable status of the water and steam
2 Phase Option R/W UINT8 1 0 → 4 0 The phase option allows you to specify the method for
“ ” Point tag identification. This value is copied from point
type 46, parameter 0.
properties calculation for the meter run. Valid values
are:
0 = Disable
1 = Enable.
determining the phase of the fluid and calculating the
properties. Valid values are:
0 = Calculate the phase based on the flowing pressure
and temperature inputs. If the flowing temperature
is within 1.8 Deg F (1.0 Deg C) of the saturation
temperature for the current flowing pressure, the
conditions are considered saturated and the phase
is set to gas (steam).
1 = The phase is set to saturated steam and the
properties are calculated using the flowing
pressure.
2 = The phase is set to saturated steam and the
properties are calculated using the flowing
temperature.
3 = The phase is set to saturated water and the
properties are calculated using the flowing
pressure.
4 = The phase is set to saturated water and the
properties are calculated using the flowing
temperature.
4-4 Reference Issued Mar-08
Water and Steam Properties Calculations Program User Manual
4.3 Point Type 28: Water/Steam Values
Point type 28 contains the parameters for the results (not stored to the meter run point types) of the Water and Steam program. There are four
logicals of this point type (one logical for each meter run).
Parm
#
Name Access Data
Type
Length Range Default
Description of functionality and meaning of values
0 Point Tag ID R/O AC 10 0x20 → 0x7E for
each ASCII
character
1 IAPWS-IF97 Region R/O UINT8 1 1 → 5 The IAPWS-IF97 region of the water/steam during the
2 Entropy R/O FLP 4 Any positive floating
point number
3 Cp R/O FLP 4 Any positive floating
point number
4 Cv R/O FLP 4 Any positive floating
point number
5 Temp Used for Props R/O FLP 4 Any positive floating
point number
6 Press Used for Props R/O FLP 4 Any positive floating
point number
“ ” Point tag identification. This value is copied from point
type 46, parameter 0.
previous IMP/BMP.
The entropy during the previous IMP/BMP. Units are
BTU/Lb-Deg R or kJ/Kg-Deg K.
The specific heat (constant pressure) during the
previous IMP/BMP. Units are BTU/Lb-Deg R or kJ/KgDeg K.
The specific heat (constant volume) during the
previous IMP/BMP. Units are BTU/Lb-Deg R or kJ/KgDeg K.
The average temperature used to determine the
properties. Units are Deg F or Deg C.
The average pressure used to determine the
properties. Units are PSIA, PSIG, or kPa.
Issued Mar-08 Reference 4-5
Water and Steam Properties Calculations Program User Manual
If you have comments or questions regarding this manual, please direct them to your local sal es representative or
contact:
Emerson Process Management
Remote Automation Solutions
Marshalltown, Iowa 50158 USA
Houston, TX 77065 USA
Pickering, North Yorkshire UK Y018 7JA
Website: www.EmersonProcess.com/Remote
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